Method for tracking objects in a scene
US8111873B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 20, 2006 |
| Grant date | Feb 7, 2012 |
| Priority date | — |
| Expiry date | May 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V20/52
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for tracking objects in a scene being viewed by a sequence of digital images comprises: separating a region of interest in the digital images into a plurality of spatially smaller, overlapping modules, and defining a hidden Markov model for each module. The method further comprises observing detections of positions of possible objects at different times, considering a set of states at a point of time (t1) such that the set of states comprises a state having a global optimum probability, and backtracking through the sequence of digital images for each hidden Markov model to shrink the set of states that are possible for earlier parts of the sequence of digital images, such that a single optimal state is found for an earlier point of time (t2<t1), whereby tracks of detected objects through the scene are determined up to the earlier point of time (t2).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.